NEW CARBON LOOK REAR BUMPER DIFFUSER FOR BMW 1 SERIES F20 F21 2015 2018 , SINGLE EXHAUST TIP ON EACH SIDE 0--0 1 X REAR DIFFUSER !! M SPORT REAR BUMPER ONLY !! WILL NOT FIT STANDARD REAR BUMPERS. MADE SPECIFICALLY FOR THE FACELIFT LCI BMW 1 SERIES F20 F21 Constructed from PP PLASTIC (instructions are not provided). Please align correctly before installation and make sure clips are fully inserted else alignment will be off. NO DIY INSTALLATION. Rear diffuser must be installed by professional experienced bodyshop and not DIY installation. Bodykit installers have the knowledge and tools for the correct preparation and installation.